121001211201021 has 32 divisors (see below), whose sum is σ = 165774196734720. Its totient is φ = 78449931012096.

The previous prime is 121001211200917. The next prime is 121001211201023. The reversal of 121001211201021 is 120102112100121.

It is a happy number.

It is not a de Polignac number, because 121001211201021 - 2⁹ = 121001211200509 is a prime.

It is a super-2 number, since 2×121001211201021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121001211201023) 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, 5305430400 + ... + 5305453206.

It is an arithmetic number, because the mean of its divisors is an integer number (5180443647960).

Almost surely, 2^{121001211201021} is an apocalyptic number.

It is an amenable number.

121001211201021 is a deficient number, since it is larger than the sum of its proper divisors (44772985533699).

121001211201021 is a wasteful number, since it uses less digits than its factorization.

121001211201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43493.

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

Adding to 121001211201021 its reverse (120102112100121), we get a palindrome (241103323301142).

It can be divided in two parts, 12100121 and 1201021, that multiplied together give a palindrome (14532499423541).

The spelling of 121001211201021 in words is "one hundred twenty-one trillion, one billion, two hundred eleven million, two hundred one thousand, twenty-one".