221220400403000 has 32 divisors (see below), whose sum is σ = 517655736945360. Its totient is φ = 88488160160800.

The previous prime is 221220400402961. The next prime is 221220400403029. The reversal of 221220400403000 is 304004022122.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 110610199202 + ... + 110610201201.

Almost surely, 2^{221220400403000} is an apocalyptic number.

221220400403000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221220400403000 is an abundant number, since it is smaller than the sum of its proper divisors (296435336542360).

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

221220400403000 is a wasteful number, since it uses less digits than its factorization.

221220400403000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221220400424 (or 221220400410 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 221220400403000 its reverse (304004022122), we get a palindrome (221524404425122).

The spelling of 221220400403000 in words is "two hundred twenty-one trillion, two hundred twenty billion, four hundred million, four hundred three thousand".