21131321213002 has 128 divisors (see below), whose sum is σ = 42633852387840. Its totient is φ = 7586177679360.

The previous prime is 21131321212997. The next prime is 21131321213029. The reversal of 21131321213002 is 20031212313112.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2994373858 + ... + 2994380914.

It is an arithmetic number, because the mean of its divisors is an integer number (333076971780).

Almost surely, 2^{21131321213002} is an apocalyptic number.

21131321213002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21131321213002 is an abundant number, since it is smaller than the sum of its proper divisors (21502531174838).

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

21131321213002 is a wasteful number, since it uses less digits than its factorization.

21131321213002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9536.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21131321213002 its reverse (20031212313112), we get a palindrome (41162533526114).

The spelling of 21131321213002 in words is "twenty-one trillion, one hundred thirty-one billion, three hundred twenty-one million, two hundred thirteen thousand, two".