10102111220 has 12 divisors (see below), whose sum is σ = 21214433604. Its totient is φ = 4040844480.

The previous prime is 10102111211. The next prime is 10102111231. The reversal of 10102111220 is 2211120101.

It can be written as a sum of positive squares in 2 ways, for example, as 1730227216 + 8371884004 = 41596^2 + 91498^2 .

It is a super-2 number, since 2×10102111220² (a number of 21 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 252552761 + ... + 252552800.

It is an arithmetic number, because the mean of its divisors is an integer number (1767869467).

Almost surely, 2^10102111220 is an apocalyptic number.

10102111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10102111220 is an abundant number, since it is smaller than the sum of its proper divisors (11112322384).

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

10102111220 is a wasteful number, since it uses less digits than its factorization.

10102111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505105570 (or 505105568 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10102111220 its reverse (2211120101), we get a palindrome (12313231321).

The spelling of 10102111220 in words is "ten billion, one hundred two million, one hundred eleven thousand, two hundred twenty".