121011020021121 has 16 divisors (see below), whose sum is σ = 163993487227200. Its totient is φ = 79351289709120.

The previous prime is 121011020021113. The next prime is 121011020021183. The reversal of 121011020021121 is 121120020110121.

It is a happy number.

It is not a de Polignac number, because 121011020021121 - 2³ = 121011020021113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121011020021121.

It is not an unprimeable number, because it can be changed into a prime (121011020022121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122134711 + ... + 123121523.

It is an arithmetic number, because the mean of its divisors is an integer number (10249592951700).

Almost surely, 2^{121011020021121} is an apocalyptic number.

It is an amenable number.

121011020021121 is a deficient number, since it is larger than the sum of its proper divisors (42982467206079).

121011020021121 is an equidigital number, since it uses as much as digits as its factorization.

121011020021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1656976.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121011020021121 its reverse (121120020110121), we get a palindrome (242131040131242).

The spelling of 121011020021121 in words is "one hundred twenty-one trillion, eleven billion, twenty million, twenty-one thousand, one hundred twenty-one".