21601261202 has 8 divisors (see below), whose sum is σ = 32467884912. Its totient is φ = 10778632900.

The previous prime is 21601261181. The next prime is 21601261219. The reversal of 21601261202 is 20216210612.

It is a happy number.

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

It is a super-2 number, since 2×21601261202² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10997624 + ... + 10999587.

It is an arithmetic number, because the mean of its divisors is an integer number (4058485614).

Almost surely, 2^21601261202 is an apocalyptic number.

21601261202 is a deficient number, since it is larger than the sum of its proper divisors (10866623710).

21601261202 is a wasteful number, since it uses less digits than its factorization.

21601261202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21997704.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 21601261202 its reverse (20216210612), we get a palindrome (41817471814).

The spelling of 21601261202 in words is "twenty-one billion, six hundred one million, two hundred sixty-one thousand, two hundred two".