1011212122100 has 36 divisors (see below), whose sum is σ = 2194668222348. Its totient is φ = 404422560000.

The previous prime is 1011212122091. The next prime is 1011212122117. The reversal of 1011212122100 is 12212121101.

It can be written as a sum of positive squares in 6 ways, for example, as 220603059856 + 790609062244 = 469684^2 + 889162^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123251 + ... + 1427450.

Almost surely, 2^{1011212122100} is an apocalyptic number.

1011212122100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011212122100 is an abundant number, since it is smaller than the sum of its proper divisors (1183456100248).

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

1011212122100 is a wasteful number, since it uses less digits than its factorization.

1011212122100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557236 (or 1557229 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1011212122100 its reverse (12212121101), we get a palindrome (1023424243201).

Subtracting from 1011212122100 its reverse (12212121101), we obtain a palindrome (999000000999).

The spelling of 1011212122100 in words is "one trillion, eleven billion, two hundred twelve million, one hundred twenty-two thousand, one hundred".