210002012012121 has 16 divisors (see below), whose sum is σ = 324386669568384. Its totient is φ = 118357298354304.

The previous prime is 210002012012087. The next prime is 210002012012129. The reversal of 210002012012121 is 121210210200012.

It is not a de Polignac number, because 210002012012121 - 2²⁷ = 210001877794393 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 210002012012121.

It is not an unprimeable number, because it can be changed into a prime (210002012012129) 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, 68493805386 + ... + 68493808451.

It is an arithmetic number, because the mean of its divisors is an integer number (20274166848024).

Almost surely, 2^{210002012012121} is an apocalyptic number.

210002012012121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

210002012012121 is a deficient number, since it is larger than the sum of its proper divisors (114384657556263).

210002012012121 is a wasteful number, since it uses less digits than its factorization.

210002012012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136987613920.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 210002012012121 its reverse (121210210200012), we get a palindrome (331212222212133).

The spelling of 210002012012121 in words is "two hundred ten trillion, two billion, twelve million, twelve thousand, one hundred twenty-one".