20122401021 has 4 divisors (see below), whose sum is σ = 26829868032. Its totient is φ = 13414934012.

The previous prime is 20122400983. The next prime is 20122401031. The reversal of 20122401021 is 12010422102.

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 20122401021 - 2⁶ = 20122400957 is a prime.

It is a super-2 number, since 2×20122401021² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122401031) 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, 3353733501 + ... + 3353733506.

It is an arithmetic number, because the mean of its divisors is an integer number (6707467008).

Almost surely, 2^20122401021 is an apocalyptic number.

It is an amenable number.

20122401021 is a deficient number, since it is larger than the sum of its proper divisors (6707467011).

20122401021 is an equidigital number, since it uses as much as digits as its factorization.

20122401021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6707467010.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20122401021 its reverse (12010422102), we get a palindrome (32132823123).

The spelling of 20122401021 in words is "twenty billion, one hundred twenty-two million, four hundred one thousand, twenty-one".