121010211012021 has 4 divisors (see below), whose sum is σ = 161346948016032. Its totient is φ = 80673474008012.

The previous prime is 121010211011983. The next prime is 121010211012107. The reversal of 121010211012021 is 120210112010121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121010211012021 - 2⁹ = 121010211011509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010211012721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20168368502001 + ... + 20168368502006.

It is an arithmetic number, because the mean of its divisors is an integer number (40336737004008).

Almost surely, 2^{121010211012021} is an apocalyptic number.

It is an amenable number.

121010211012021 is a deficient number, since it is larger than the sum of its proper divisors (40336737004011).

121010211012021 is an equidigital number, since it uses as much as digits as its factorization.

121010211012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40336737004010.

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

Adding to 121010211012021 its reverse (120210112010121), we get a palindrome (241220323022142).

The spelling of 121010211012021 in words is "one hundred twenty-one trillion, ten billion, two hundred eleven million, twelve thousand, twenty-one".