121101012021 has 32 divisors (see below), whose sum is σ = 178396629120. Its totient is φ = 72461312000.

The previous prime is 121101011989. The next prime is 121101012049. The reversal of 121101012021 is 120210101121.

It is not a de Polignac number, because 121101012021 - 2⁵ = 121101011989 is a prime.

It is a super-2 number, since 2×121101012021² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121101011988 and 121101012006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121101011021) 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, 1125085 + ... + 1228013.

It is an arithmetic number, because the mean of its divisors is an integer number (5574894660).

Almost surely, 2^121101012021 is an apocalyptic number.

121101012021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121101012021 is a deficient number, since it is larger than the sum of its proper divisors (57295617099).

121101012021 is a wasteful number, since it uses less digits than its factorization.

121101012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103397.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121101012021 its reverse (120210101121), we get a palindrome (241311113142).

The spelling of 121101012021 in words is "one hundred twenty-one billion, one hundred one million, twelve thousand, twenty-one".