21202202031 has 8 divisors (see below), whose sum is σ = 29181525504. Its totient is φ = 13678839960.

The previous prime is 21202202029. The next prime is 21202202041. The reversal of 21202202031 is 13020220212.

It is a happy number.

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

It is not a de Polignac number, because 21202202031 - 2¹ = 21202202029 is a prime.

It is a super-2 number, since 2×21202202031² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21202202031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202202041) 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, 113990241 + ... + 113990426.

It is an arithmetic number, because the mean of its divisors is an integer number (3647690688).

Almost surely, 2^21202202031 is an apocalyptic number.

21202202031 is a deficient number, since it is larger than the sum of its proper divisors (7979323473).

21202202031 is a wasteful number, since it uses less digits than its factorization.

21202202031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227980701.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21202202031 its reverse (13020220212), we get a palindrome (34222422243).

The spelling of 21202202031 in words is "twenty-one billion, two hundred two million, two hundred two thousand, thirty-one".