10111000021220 has 48 divisors (see below), whose sum is σ = 24291494895360. Its totient is φ = 3463043601024.

The previous prime is 10111000021183. The next prime is 10111000021223. The reversal of 10111000021220 is 2212000011101.

It is a super-2 number, since 2×10111000021220² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10111000021223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37207655 + ... + 37478414.

It is an arithmetic number, because the mean of its divisors is an integer number (506072810320).

Almost surely, 2^{10111000021220} is an apocalyptic number.

10111000021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10111000021220 is an abundant number, since it is smaller than the sum of its proper divisors (14180494874140).

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

10111000021220 is a wasteful number, since it uses less digits than its factorization.

10111000021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74687052 (or 74687050 counting only the distinct ones).

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

Adding to 10111000021220 its reverse (2212000011101), we get a palindrome (12323000032321).

The spelling of 10111000021220 in words is "ten trillion, one hundred eleven billion, twenty-one thousand, two hundred twenty".