21322001121031 has 16 divisors (see below), whose sum is σ = 23351661194400. Its totient is φ = 19347993842688.

The previous prime is 21322001121017. The next prime is 21322001121107. The reversal of 21322001121031 is 13012110022312.

It is a cyclic number.

It is not a de Polignac number, because 21322001121031 - 2²³ = 21321992732423 is a prime.

It is a super-2 number, since 2×21322001121031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322001121011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76789215 + ... + 77066383.

It is an arithmetic number, because the mean of its divisors is an integer number (1459478824650).

Almost surely, 2^{21322001121031} is an apocalyptic number.

21322001121031 is a deficient number, since it is larger than the sum of its proper divisors (2029660073369).

21322001121031 is a wasteful number, since it uses less digits than its factorization.

21322001121031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377538.

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

Adding to 21322001121031 its reverse (13012110022312), we get a palindrome (34334111143343).

The spelling of 21322001121031 in words is "twenty-one trillion, three hundred twenty-two billion, one million, one hundred twenty-one thousand, thirty-one".