10212012121 has 32 divisors (see below), whose sum is σ = 11266801920. Its totient is φ = 9225216000.

The previous prime is 10212012071. The next prime is 10212012127. The reversal of 10212012121 is 12121021201.

It is a cyclic number.

It is not a de Polignac number, because 10212012121 - 2¹⁷ = 10211881049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10212012127) 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, 6377721 + ... + 6379321.

It is an arithmetic number, because the mean of its divisors is an integer number (352087560).

Almost surely, 2^10212012121 is an apocalyptic number.

It is an amenable number.

10212012121 is a deficient number, since it is larger than the sum of its proper divisors (1054789799).

10212012121 is a wasteful number, since it uses less digits than its factorization.

10212012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10212012121 its reverse (12121021201), we get a palindrome (22333033322).

The spelling of 10212012121 in words is "ten billion, two hundred twelve million, twelve thousand, one hundred twenty-one".