1012111203220 has 24 divisors (see below), whose sum is σ = 2288928414024. Its totient is φ = 373702598016.

The previous prime is 1012111203217. The next prime is 1012111203253. The reversal of 1012111203220 is 223021112101.

It can be written as a sum of positive squares in 4 ways, for example, as 533887236 + 1011577315984 = 23106^2 + 1005772^2 .

It is a super-2 number, since 2×1012111203220² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1012111203194 and 1012111203203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1946367439 + ... + 1946367958.

It is an arithmetic number, because the mean of its divisors is an integer number (95372017251).

Almost surely, 2^{1012111203220} is an apocalyptic number.

1012111203220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012111203220 is an abundant number, since it is smaller than the sum of its proper divisors (1276817210804).

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

1012111203220 is a wasteful number, since it uses less digits than its factorization.

1012111203220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3892735419 (or 3892735417 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1012111203220 its reverse (223021112101), we get a palindrome (1235132315321).

The spelling of 1012111203220 in words is "one trillion, twelve billion, one hundred eleven million, two hundred three thousand, two hundred twenty".