121210122200220 has 72 divisors (see below), whose sum is σ = 374607887131296. Its totient is φ = 31712837000832.

The previous prime is 121210122200203. The next prime is 121210122200303. The reversal of 121210122200220 is 22002221012121.

It is a happy number.

121210122200220 is a `hidden beast` number, since 1 + 2 + 1 + 210 + 12 + 220 + 0 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121210122200193 and 121210122200202.

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, 6352722232 + ... + 6352741311.

It is an arithmetic number, because the mean of its divisors is an integer number (5202887321268).

Almost surely, 2^{121210122200220} is an apocalyptic number.

121210122200220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121210122200220 is an abundant number, since it is smaller than the sum of its proper divisors (253397764931076).

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

121210122200220 is a wasteful number, since it uses less digits than its factorization.

121210122200220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12705463611 (or 12705463606 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121210122200220 its reverse (22002221012121), we get a palindrome (143212343212341).

The spelling of 121210122200220 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred twenty-two million, two hundred thousand, two hundred twenty".