10122120021 has 16 divisors (see below), whose sum is σ = 15299291840. Its totient is φ = 5901154560.

The previous prime is 10122119989. The next prime is 10122120053. The reversal of 10122120021 is 12002122101.

It is an interprime number because it is at equal distance from previous prime (10122119989) and next prime (10122120053).

It is not a de Polignac number, because 10122120021 - 2⁵ = 10122119989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10122119979 and 10122120006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10122120121) 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, 6829300 + ... + 6830781.

It is an arithmetic number, because the mean of its divisors is an integer number (956205740).

Almost surely, 2^10122120021 is an apocalyptic number.

It is an amenable number.

10122120021 is a deficient number, since it is larger than the sum of its proper divisors (5177171819).

10122120021 is a wasteful number, since it uses less digits than its factorization.

10122120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13660116.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 10122120021 its reverse (12002122101), we get a palindrome (22124242122).

The spelling of 10122120021 in words is "ten billion, one hundred twenty-two million, one hundred twenty thousand, twenty-one".