21001300131022 has 4 divisors (see below), whose sum is σ = 31501950196536. Its totient is φ = 10500650065510.

The previous prime is 21001300131001. The next prime is 21001300131029. The reversal of 21001300131022 is 22013100310012.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21001300130987 and 21001300131005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001300131029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5250325032754 + ... + 5250325032757.

It is an arithmetic number, because the mean of its divisors is an integer number (7875487549134).

Almost surely, 2^{21001300131022} is an apocalyptic number.

21001300131022 is a deficient number, since it is larger than the sum of its proper divisors (10500650065514).

21001300131022 is a wasteful number, since it uses less digits than its factorization.

21001300131022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10500650065513.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21001300131022 its reverse (22013100310012), we get a palindrome (43014400441034).

The spelling of 21001300131022 in words is "twenty-one trillion, one billion, three hundred million, one hundred thirty-one thousand, twenty-two".