1212111112100 has 72 divisors (see below), whose sum is σ = 3109692008640. Its totient is φ = 401250568320.

The previous prime is 1212111112061. The next prime is 1212111112127. The reversal of 1212111112100 is 12111112121.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29834654 + ... + 29875253.

Almost surely, 2^{1212111112100} is an apocalyptic number.

1212111112100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212111112100 is an abundant number, since it is smaller than the sum of its proper divisors (1897580896540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212111112100 is a wasteful number, since it uses less digits than its factorization.

1212111112100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59709957 (or 59709950 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1212111112100 its reverse (12111112121), we get a palindrome (1224222224221).

The spelling of 1212111112100 in words is "one trillion, two hundred twelve billion, one hundred eleven million, one hundred twelve thousand, one hundred".