21220213125053 has 8 divisors (see below), whose sum is σ = 21489813978048. Its totient is φ = 20951834952384.

The previous prime is 21220213125031. The next prime is 21220213125169. The reversal of 21220213125053 is 35052131202212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21220213125053 - 2³⁴ = 21203033255869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220213125253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305635151 + ... + 305704572.

It is an arithmetic number, because the mean of its divisors is an integer number (2686226747256).

Almost surely, 2^{21220213125053} is an apocalyptic number.

It is an amenable number.

21220213125053 is a deficient number, since it is larger than the sum of its proper divisors (269600852995).

21220213125053 is a wasteful number, since it uses less digits than its factorization.

21220213125053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611340163.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 21220213125053 its reverse (35052131202212), we get a palindrome (56272344327265).

The spelling of 21220213125053 in words is "twenty-one trillion, two hundred twenty billion, two hundred thirteen million, one hundred twenty-five thousand, fifty-three".