1220400044012 has 24 divisors (see below), whose sum is σ = 2187851429232. Its totient is φ = 595300467200.

The previous prime is 1220400043999. The next prime is 1220400044023. The reversal of 1220400044012 is 2104400040221.

It is a super-2 number, since 2×1220400044012² (a number of 25 digits) contains 22 as substring.

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, 7458308 + ... + 7620180.

It is an arithmetic number, because the mean of its divisors is an integer number (91160476218).

Almost surely, 2^{1220400044012} is an apocalyptic number.

It is an amenable number.

1220400044012 is a deficient number, since it is larger than the sum of its proper divisors (967451385220).

1220400044012 is a wasteful number, since it uses less digits than its factorization.

1220400044012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207889 (or 207887 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 1220400044012 its reverse (2104400040221), we get a palindrome (3324800084233).

The spelling of 1220400044012 in words is "one trillion, two hundred twenty billion, four hundred million, forty-four thousand, twelve".