210021012102121 has 16 divisors (see below), whose sum is σ = 241320685858560. Its totient is φ = 180768166739280.

The previous prime is 210021012102113. The next prime is 210021012102127. The reversal of 210021012102121 is 121201210120012.

It is a cyclic number.

It is not a de Polignac number, because 210021012102121 - 2³ = 210021012102113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210021012102095 and 210021012102104.

It is not an unprimeable number, because it can be changed into a prime (210021012102127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308475331 + ... + 309155416.

It is an arithmetic number, because the mean of its divisors is an integer number (15082542866160).

Almost surely, 2^{210021012102121} is an apocalyptic number.

It is an amenable number.

210021012102121 is a deficient number, since it is larger than the sum of its proper divisors (31299673756439).

210021012102121 is a wasteful number, since it uses less digits than its factorization.

210021012102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617632404.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 210021012102121 its reverse (121201210120012), we get a palindrome (331222222222133).

The spelling of 210021012102121 in words is "two hundred ten trillion, twenty-one billion, twelve million, one hundred two thousand, one hundred twenty-one".