1011010020157 has 2 divisors, whose sum is σ = 1011010020158. Its totient is φ = 1011010020156.

The previous prime is 1011010020107. The next prime is 1011010020193. The reversal of 1011010020157 is 7510200101101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 943250806521 + 67759213636 = 971211^2 + 260306^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011010020157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011010020107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505505010078 + 505505010079.

It is an arithmetic number, because the mean of its divisors is an integer number (505505010079).

Almost surely, 2^{1011010020157} is an apocalyptic number.

It is an amenable number.

1011010020157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011010020157 is an equidigital number, since it uses as much as digits as its factorization.

1011010020157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70, while the sum is 19.

Adding to 1011010020157 its reverse (7510200101101), we get a palindrome (8521210121258).

The spelling of 1011010020157 in words is "one trillion, eleven billion, ten million, twenty thousand, one hundred fifty-seven".