21122130321001 has 4 divisors (see below), whose sum is σ = 21123229363600. Its totient is φ = 21121031278404.

The previous prime is 21122130320987. The next prime is 21122130321023. The reversal of 21122130321001 is 10012303122112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21122130321001 - 2¹¹ = 21122130318953 is a prime.

It is a super-2 number, since 2×21122130321001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21122130321001.

It is not an unprimeable number, because it can be changed into a prime (21122130321031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 549492471 + ... + 549530908.

It is an arithmetic number, because the mean of its divisors is an integer number (5280807340900).

Almost surely, 2^{21122130321001} is an apocalyptic number.

It is an amenable number.

21122130321001 is a deficient number, since it is larger than the sum of its proper divisors (1099042599).

21122130321001 is a wasteful number, since it uses less digits than its factorization.

21122130321001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099042598.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21122130321001 its reverse (10012303122112), we get a palindrome (31134433443113).

The spelling of 21122130321001 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred thirty million, three hundred twenty-one thousand, one".