121020210021210 has 32 divisors (see below), whose sum is σ = 290917726234560. Its totient is φ = 32219920207488.

The previous prime is 121020210021209. The next prime is 121020210021311. The reversal of 121020210021210 is 12120012020121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121020210021210.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3258468507 + ... + 3258505646.

It is an arithmetic number, because the mean of its divisors is an integer number (9091178944830).

Almost surely, 2^{121020210021210} is an apocalyptic number.

121020210021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121020210021210 is an abundant number, since it is smaller than the sum of its proper divisors (169897516213350).

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

121020210021210 is a wasteful number, since it uses less digits than its factorization.

121020210021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6516974782.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121020210021210 its reverse (12120012020121), we get a palindrome (133140222041331).

The spelling of 121020210021210 in words is "one hundred twenty-one trillion, twenty billion, two hundred ten million, twenty-one thousand, two hundred ten".