121201211121010 has 64 divisors (see below), whose sum is σ = 222439682286720. Its totient is φ = 47531269094400.

The previous prime is 121201211120953. The next prime is 121201211121013. The reversal of 121201211121010 is 10121112102121.

It is not an unprimeable number, because it can be changed into a prime (121201211121013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4481782549 + ... + 4481809591.

It is an arithmetic number, because the mean of its divisors is an integer number (3475620035730).

Almost surely, 2^{121201211121010} is an apocalyptic number.

121201211121010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121201211121010 is a deficient number, since it is larger than the sum of its proper divisors (101238471165710).

121201211121010 is a wasteful number, since it uses less digits than its factorization.

121201211121010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32923.

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

Adding to 121201211121010 its reverse (10121112102121), we get a palindrome (131322323223131).

The spelling of 121201211121010 in words is "one hundred twenty-one trillion, two hundred one billion, two hundred eleven million, one hundred twenty-one thousand, ten".