121201220221100 has 36 divisors (see below), whose sum is σ = 263007593259600. Its totient is φ = 48480313824960.

The previous prime is 121201220221087. The next prime is 121201220221111. The reversal of 121201220221100 is 1122022102121.

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, 27838946 + ... + 31896854.

Almost surely, 2^{121201220221100} is an apocalyptic number.

121201220221100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121201220221100 is an abundant number, since it is smaller than the sum of its proper divisors (141806373038500).

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

121201220221100 is a wasteful number, since it uses less digits than its factorization.

121201220221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4356602 (or 4356595 counting only the distinct ones).

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

Adding to 121201220221100 its reverse (1122022102121), we get a palindrome (122323242323221).

The spelling of 121201220221100 in words is "one hundred twenty-one trillion, two hundred one billion, two hundred twenty million, two hundred twenty-one thousand, one hundred".