1212222131100 has 108 divisors (see below), whose sum is σ = 3902336083464. Its totient is φ = 314522490240.

The previous prime is 1212222131069. The next prime is 1212222131117. The reversal of 1212222131100 is 11312222121.

1212222131100 is a `hidden beast` number, since 1 + 212 + 222 + 131 + 100 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 18168234 + ... + 18234833.

Almost surely, 2^{1212222131100} is an apocalyptic number.

1212222131100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212222131100 is an abundant number, since it is smaller than the sum of its proper divisors (2690113952364).

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

1212222131100 is a wasteful number, since it uses less digits than its factorization.

1212222131100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36403124 (or 36403114 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1212222131100 its reverse (11312222121), we get a palindrome (1223534353221).

The spelling of 1212222131100 in words is "one trillion, two hundred twelve billion, two hundred twenty-two million, one hundred thirty-one thousand, one hundred".