101212111220 has 48 divisors (see below), whose sum is σ = 232187050368. Its totient is φ = 36753720960.

The previous prime is 101212111207. The next prime is 101212111249. The reversal of 101212111220 is 22111212101.

It is a junction number, because it is equal to n+sod(n) for n = 101212111195 and 101212111204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156467 + ... + 476346.

It is an arithmetic number, because the mean of its divisors is an integer number (4837230216).

Almost surely, 2^101212111220 is an apocalyptic number.

101212111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101212111220 is an abundant number, since it is smaller than the sum of its proper divisors (130974939148).

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

101212111220 is a wasteful number, since it uses less digits than its factorization.

101212111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633560 (or 633558 counting only the distinct ones).

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

Adding to 101212111220 its reverse (22111212101), we get a palindrome (123323323321).

The spelling of 101212111220 in words is "one hundred one billion, two hundred twelve million, one hundred eleven thousand, two hundred twenty".