121201222011020 has 24 divisors (see below), whose sum is σ = 255102344296800. Its totient is φ = 48370054885632.

The previous prime is 121201222010987. The next prime is 121201222011097. The reversal of 121201222011020 is 20110222102121.

It is a self number, because there is not a number n which added to its sum of digits gives 121201222011020.

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, 6902110925 + ... + 6902128484.

It is an arithmetic number, because the mean of its divisors is an integer number (10629264345700).

Almost surely, 2^{121201222011020} is an apocalyptic number.

121201222011020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121201222011020 is an abundant number, since it is smaller than the sum of its proper divisors (133901122285780).

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

121201222011020 is a wasteful number, since it uses less digits than its factorization.

121201222011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13804239857 (or 13804239855 counting only the distinct ones).

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

Adding to 121201222011020 its reverse (20110222102121), we get a palindrome (141311444113141).

The spelling of 121201222011020 in words is "one hundred twenty-one trillion, two hundred one billion, two hundred twenty-two million, eleven thousand, twenty".