21121334261502 has 64 divisors (see below), whose sum is σ = 45255106560000. Its totient is φ = 6552372629088.

The previous prime is 21121334261497. The next prime is 21121334261509. The reversal of 21121334261502 is 20516243312112.

It is a super-2 number, since 2×21121334261502² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121334261509) 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, 4100398 + ... + 7684785.

It is an arithmetic number, because the mean of its divisors is an integer number (707111040000).

Almost surely, 2^{21121334261502} is an apocalyptic number.

21121334261502 is an abundant number, since it is smaller than the sum of its proper divisors (24133772298498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21121334261502 is a wasteful number, since it uses less digits than its factorization.

21121334261502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11785485.

The product of its (nonzero) digits is 17280, while the sum is 33.

Adding to 21121334261502 its reverse (20516243312112), we get a palindrome (41637577573614).

The spelling of 21121334261502 in words is "twenty-one trillion, one hundred twenty-one billion, three hundred thirty-four million, two hundred sixty-one thousand, five hundred two".