1011010020121 has 4 divisors (see below), whose sum is σ = 1030085680932. Its totient is φ = 991934359312.

The previous prime is 1011010020107. The next prime is 1011010020157. The reversal of 1011010020121 is 1210200101101.

1011010020121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 449013907225 + 561996112896 = 670085^2 + 749664^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011010020121 - 2¹⁷ = 1011009889049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011010020098 and 1011010020107.

It is not an unprimeable number, because it can be changed into a prime (1011010026121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9537830326 + ... + 9537830431.

It is an arithmetic number, because the mean of its divisors is an integer number (257521420233).

Almost surely, 2^{1011010020121} is an apocalyptic number.

It is an amenable number.

1011010020121 is a deficient number, since it is larger than the sum of its proper divisors (19075660811).

1011010020121 is an equidigital number, since it uses as much as digits as its factorization.

1011010020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19075660810.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1011010020121 its reverse (1210200101101), we get a palindrome (2221210121222).

The spelling of 1011010020121 in words is "one trillion, eleven billion, ten million, twenty thousand, one hundred twenty-one".