121211012210 has 16 divisors (see below), whose sum is σ = 218287495296. Its totient is φ = 48460477488.

The previous prime is 121211012201. The next prime is 121211012249. The reversal of 121211012210 is 12210112121.

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, 2969642 + ... + 3010181.

It is an arithmetic number, because the mean of its divisors is an integer number (13642968456).

Almost surely, 2^121211012210 is an apocalyptic number.

121211012210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121211012210 is a deficient number, since it is larger than the sum of its proper divisors (97076483086).

121211012210 is a wasteful number, since it uses less digits than its factorization.

121211012210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5981857.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121211012210 its reverse (12210112121), we get a palindrome (133421124331).

The spelling of 121211012210 in words is "one hundred twenty-one billion, two hundred eleven million, twelve thousand, two hundred ten".