221220201001100 has 36 divisors (see below), whose sum is σ = 548626098484464. Its totient is φ = 75846926057280.

The previous prime is 221220201001081. The next prime is 221220201001223. The reversal of 221220201001100 is 1100102022122.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158014428587 + ... + 158014429986.

Almost surely, 2^{221220201001100} is an apocalyptic number.

221220201001100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221220201001100 is an abundant number, since it is smaller than the sum of its proper divisors (327405897483364).

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

221220201001100 is a wasteful number, since it uses less digits than its factorization.

221220201001100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316028858594 (or 316028858587 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221220201001100 its reverse (1100102022122), we get a palindrome (222320303023222).

The spelling of 221220201001100 in words is "two hundred twenty-one trillion, two hundred twenty billion, two hundred one million, one thousand, one hundred".