121211212202210 has 96 divisors (see below), whose sum is σ = 243909540306432. Its totient is φ = 43111360615680.

The previous prime is 121211212202159. The next prime is 121211212202299. The reversal of 121211212202210 is 12202212112121.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45835067 + ... + 48407393.

It is an arithmetic number, because the mean of its divisors is an integer number (2540724378192).

Almost surely, 2^{121211212202210} is an apocalyptic number.

121211212202210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121211212202210 is an abundant number, since it is smaller than the sum of its proper divisors (122698328104222).

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

121211212202210 is a wasteful number, since it uses less digits than its factorization.

121211212202210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572836 (or 2572807 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 121211212202210 its reverse (12202212112121), we get a palindrome (133413424314331).

The spelling of 121211212202210 in words is "one hundred twenty-one trillion, two hundred eleven billion, two hundred twelve million, two hundred two thousand, two hundred ten".