21214036501031 has 12 divisors (see below), whose sum is σ = 23354172217656. Its totient is φ = 19255494675120.

The previous prime is 21214036500989. The next prime is 21214036501039. The reversal of 21214036501031 is 13010563041212.

It is not a de Polignac number, because 21214036501031 - 2¹⁸ = 21214036238887 is a prime.

It is a super-2 number, since 2×21214036501031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21214036500985 and 21214036501003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214036501039) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136253936 + ... + 136409541.

It is an arithmetic number, because the mean of its divisors is an integer number (1946181018138).

Almost surely, 2^{21214036501031} is an apocalyptic number.

21214036501031 is a deficient number, since it is larger than the sum of its proper divisors (2140135716625).

21214036501031 is a wasteful number, since it uses less digits than its factorization.

21214036501031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272664142 (or 272664131 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 21214036501031 its reverse (13010563041212), we get a palindrome (34224599542243).

The spelling of 21214036501031 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred one thousand, thirty-one".