21202131122030 has 64 divisors (see below), whose sum is σ = 38386988640000. Its totient is φ = 8431388098560.

The previous prime is 21202131122021. The next prime is 21202131122059. The reversal of 21202131122030 is 3022113120212.

It is a junction number, because it is equal to n+sod(n) for n = 21202131121993 and 21202131122011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7712669096 + ... + 7712671844.

It is an arithmetic number, because the mean of its divisors is an integer number (599796697500).

Almost surely, 2^{21202131122030} is an apocalyptic number.

21202131122030 is a deficient number, since it is larger than the sum of its proper divisors (17184857517970).

21202131122030 is a wasteful number, since it uses less digits than its factorization.

21202131122030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6909.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21202131122030 its reverse (3022113120212), we get a palindrome (24224244242242).

The spelling of 21202131122030 in words is "twenty-one trillion, two hundred two billion, one hundred thirty-one million, one hundred twenty-two thousand, thirty".