100212012121 has 8 divisors (see below), whose sum is σ = 107966565504. Its totient is φ = 92464021200.

The previous prime is 100212012107. The next prime is 100212012181. The reversal of 100212012121 is 121210212001.

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 100212012121 - 2⁷ = 100212011993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100212012181) 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, 1608871 + ... + 1669996.

It is an arithmetic number, because the mean of its divisors is an integer number (13495820688).

Almost surely, 2^100212012121 is an apocalyptic number.

It is an amenable number.

100212012121 is a deficient number, since it is larger than the sum of its proper divisors (7754553383).

100212012121 is a wasteful number, since it uses less digits than its factorization.

100212012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3281231.

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

Adding to 100212012121 its reverse (121210212001), we get a palindrome (221422224122).

The spelling of 100212012121 in words is "one hundred billion, two hundred twelve million, twelve thousand, one hundred twenty-one".