10121011220 has 12 divisors (see below), whose sum is σ = 21254123604. Its totient is φ = 4048404480.

The previous prime is 10121011157. The next prime is 10121011231. The reversal of 10121011220 is 2211012101.

It can be written as a sum of positive squares in 2 ways, for example, as 1978114576 + 8142896644 = 44476^2 + 90238^2 .

It is a super-3 number, since 3×10121011220³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253025261 + ... + 253025300.

It is an arithmetic number, because the mean of its divisors is an integer number (1771176967).

Almost surely, 2^10121011220 is an apocalyptic number.

10121011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10121011220 is an abundant number, since it is smaller than the sum of its proper divisors (11133112384).

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

10121011220 is a wasteful number, since it uses less digits than its factorization.

10121011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506050570 (or 506050568 counting only the distinct ones).

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

Adding to 10121011220 its reverse (2211012101), we get a palindrome (12332023321).

The spelling of 10121011220 in words is "ten billion, one hundred twenty-one million, eleven thousand, two hundred twenty".