100121012212 has 12 divisors (see below), whose sum is σ = 188689600036. Its totient is φ = 46209697920.

The previous prime is 100121012207. The next prime is 100121012239. The reversal of 100121012212 is 212210121001.

It can be written as a sum of positive squares in 2 ways, for example, as 46610219236 + 53510792976 = 215894^2 + 231324^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 100121012192 and 100121012201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 962701989 + ... + 962702092.

Almost surely, 2^100121012212 is an apocalyptic number.

It is an amenable number.

100121012212 is a deficient number, since it is larger than the sum of its proper divisors (88568587824).

100121012212 is a wasteful number, since it uses less digits than its factorization.

100121012212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925404098 (or 1925404096 counting only the distinct ones).

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

Adding to 100121012212 its reverse (212210121001), we get a palindrome (312331133213).

The spelling of 100121012212 in words is "one hundred billion, one hundred twenty-one million, twelve thousand, two hundred twelve".