121221223021400 has 96 divisors (see below), whose sum is σ = 289490306434560. Its totient is φ = 47180769767040.

The previous prime is 121221223021399. The next prime is 121221223021433. The reversal of 121221223021400 is 4120322122121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24535712 + ... + 29059311.

It is an arithmetic number, because the mean of its divisors is an integer number (3015524025360).

Almost surely, 2^{121221223021400} is an apocalyptic number.

121221223021400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121221223021400 is an abundant number, since it is smaller than the sum of its proper divisors (168269083413160).

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

121221223021400 is a wasteful number, since it uses less digits than its factorization.

121221223021400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53595345 (or 53595336 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 121221223021400 its reverse (4120322122121), we get a palindrome (125341545143521).

The spelling of 121221223021400 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred twenty-three million, twenty-one thousand, four hundred".