101220212120 has 64 divisors (see below), whose sum is σ = 228843014400. Its totient is φ = 40293393280.

The previous prime is 101220212111. The next prime is 101220212143. The reversal of 101220212120 is 21212022101.

It is a junction number, because it is equal to n+sod(n) for n = 101220212095 and 101220212104.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8191787 + ... + 8204133.

It is an arithmetic number, because the mean of its divisors is an integer number (3575672100).

Almost surely, 2^101220212120 is an apocalyptic number.

101220212120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101220212120 is an abundant number, since it is smaller than the sum of its proper divisors (127622802280).

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

101220212120 is a wasteful number, since it uses less digits than its factorization.

101220212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13328 (or 13324 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 101220212120 its reverse (21212022101), we get a palindrome (122432234221).

The spelling of 101220212120 in words is "one hundred one billion, two hundred twenty million, two hundred twelve thousand, one hundred twenty".