20122010421 has 16 divisors (see below), whose sum is σ = 26908223040. Its totient is φ = 13375290240.

The previous prime is 20122010413. The next prime is 20122010443. The reversal of 20122010421 is 12401022102.

It is not a de Polignac number, because 20122010421 - 2³ = 20122010413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20122010421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122011421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1664826 + ... + 1676868.

It is an arithmetic number, because the mean of its divisors is an integer number (1681763940).

Almost surely, 2^20122010421 is an apocalyptic number.

It is an amenable number.

20122010421 is a deficient number, since it is larger than the sum of its proper divisors (6786212619).

20122010421 is a wasteful number, since it uses less digits than its factorization.

20122010421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13636.

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

Adding to 20122010421 its reverse (12401022102), we get a palindrome (32523032523).

The spelling of 20122010421 in words is "twenty billion, one hundred twenty-two million, ten thousand, four hundred twenty-one".