12101201021 has 32 divisors (see below), whose sum is σ = 15311052288. Its totient is φ = 9310049280.

The previous prime is 12101201003. The next prime is 12101201027. The reversal of 12101201021 is 12010210121.

It is not a de Polignac number, because 12101201021 - 2¹⁴ = 12101184637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12101200993 and 12101201011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101201027) 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, 458825 + ... + 484481.

It is an arithmetic number, because the mean of its divisors is an integer number (478470384).

Almost surely, 2^12101201021 is an apocalyptic number.

It is an amenable number.

12101201021 is a deficient number, since it is larger than the sum of its proper divisors (3209851267).

12101201021 is a wasteful number, since it uses less digits than its factorization.

12101201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25821.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12101201021 its reverse (12010210121), we get a palindrome (24111411142).

The spelling of 12101201021 in words is "twelve billion, one hundred one million, two hundred one thousand, twenty-one".