20001002213031 has 128 divisors (see below), whose sum is σ = 32983527628800. Its totient is φ = 10521114624000.

The previous prime is 20001002212973. The next prime is 20001002213051. The reversal of 20001002213031 is 13031220010002.

It is not a de Polignac number, because 20001002213031 - 2⁶ = 20001002212967 is a prime.

It is a super-2 number, since 2×20001002213031² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20001002213031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001002213051) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 7713458871 + ... + 7713461463.

It is an arithmetic number, because the mean of its divisors is an integer number (257683809600).

Almost surely, 2^{20001002213031} is an apocalyptic number.

20001002213031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20001002213031 is a deficient number, since it is larger than the sum of its proper divisors (12982525415769).

20001002213031 is a wasteful number, since it uses less digits than its factorization.

20001002213031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4389.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20001002213031 its reverse (13031220010002), we get a palindrome (33032222223033).

The spelling of 20001002213031 in words is "twenty trillion, one billion, two million, two hundred thirteen thousand, thirty-one".