21111332201031 has 32 divisors (see below), whose sum is σ = 28989870336000. Its totient is φ = 13658920793856.

The previous prime is 21111332201023. The next prime is 21111332201119. The reversal of 21111332201031 is 13010223311112.

It is not a de Polignac number, because 21111332201031 - 2³ = 21111332201023 is a prime.

It is a super-2 number, since 2×21111332201031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21111332200989 and 21111332201007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111332201231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9801595 + ... + 11759843.

It is an arithmetic number, because the mean of its divisors is an integer number (905933448000).

Almost surely, 2^{21111332201031} is an apocalyptic number.

21111332201031 is a deficient number, since it is larger than the sum of its proper divisors (7878538134969).

21111332201031 is a wasteful number, since it uses less digits than its factorization.

21111332201031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1958943.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 21111332201031 its reverse (13010223311112), we get a palindrome (34121555512143).

The spelling of 21111332201031 in words is "twenty-one trillion, one hundred eleven billion, three hundred thirty-two million, two hundred one thousand, thirty-one".