210021021012121 has 8 divisors (see below), whose sum is σ = 229116161232288. Its totient is φ = 190926267480000.

The previous prime is 210021021012113. The next prime is 210021021012181. The reversal of 210021021012121 is 121210120120012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 210021021012121 - 2³ = 210021021012113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210021021012095 and 210021021012104.

It is not an unprimeable number, because it can be changed into a prime (210021021012181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95535795 + ... + 97709416.

It is an arithmetic number, because the mean of its divisors is an integer number (28639520154036).

Almost surely, 2^{210021021012121} is an apocalyptic number.

It is an amenable number.

210021021012121 is a deficient number, since it is larger than the sum of its proper divisors (19095140220167).

210021021012121 is a wasteful number, since it uses less digits than its factorization.

210021021012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193344023.

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

Adding to 210021021012121 its reverse (121210120120012), we get a palindrome (331231141132133).

The spelling of 210021021012121 in words is "two hundred ten trillion, twenty-one billion, twenty-one million, twelve thousand, one hundred twenty-one".