221211022102100 has 36 divisors (see below), whose sum is σ = 487192513766784. Its totient is φ = 87163746019680.

The previous prime is 221211022102079. The next prime is 221211022102123. The reversal of 221211022102100 is 1201220112122.

It is a congruent number.

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, 16508278532 + ... + 16508291931.

Almost surely, 2^{221211022102100} is an apocalyptic number.

221211022102100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221211022102100 is an abundant number, since it is smaller than the sum of its proper divisors (265981491664684).

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

221211022102100 is a wasteful number, since it uses less digits than its factorization.

221211022102100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33016570544 (or 33016570537 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221211022102100 its reverse (1201220112122), we get a palindrome (222412242214222).

It can be divided in two parts, 221211022 and 102100, that added together give a palindrome (221313122).

The spelling of 221211022102100 in words is "two hundred twenty-one trillion, two hundred eleven billion, twenty-two million, one hundred two thousand, one hundred".