121221110211010 has 32 divisors (see below), whose sum is σ = 218253403687680. Its totient is φ = 48476133418368.

The previous prime is 121221110210987. The next prime is 121221110211037. The reversal of 121221110211010 is 10112011122121.

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, 648289911 + ... + 648476869.

It is an arithmetic number, because the mean of its divisors is an integer number (6820418865240).

Almost surely, 2^{121221110211010} is an apocalyptic number.

121221110211010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121221110211010 is a deficient number, since it is larger than the sum of its proper divisors (97032293476670).

121221110211010 is a wasteful number, since it uses less digits than its factorization.

121221110211010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203082.

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

Adding to 121221110211010 its reverse (10112011122121), we get a palindrome (131333121333131).

The spelling of 121221110211010 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, one hundred ten million, two hundred eleven thousand, ten".