200102121021 has 32 divisors (see below), whose sum is σ = 299362963968. Its totient is φ = 117823083840.

The previous prime is 200102120993. The next prime is 200102121059. The reversal of 200102121021 is 120121201002.

It is not a de Polignac number, because 200102121021 - 2⁶ = 200102120957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 200102120988 and 200102121006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200102121421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 713970 + ... + 953916.

It is an arithmetic number, because the mean of its divisors is an integer number (9355092624).

Almost surely, 2^200102121021 is an apocalyptic number.

It is an amenable number.

200102121021 is a deficient number, since it is larger than the sum of its proper divisors (99260842947).

200102121021 is a wasteful number, since it uses less digits than its factorization.

200102121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240681.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 200102121021 its reverse (120121201002), we get a palindrome (320223322023).

It can be divided in two parts, 200102 and 121021, that added together give a palindrome (321123).

The spelling of 200102121021 in words is "two hundred billion, one hundred two million, one hundred twenty-one thousand, twenty-one".