20100221132031 has 24 divisors (see below), whose sum is σ = 31023546942960. Its totient is φ = 12496197908736.

The previous prime is 20100221131961. The next prime is 20100221132041. The reversal of 20100221132031 is 13023112200102.

20100221132031 is a `hidden beast` number, since 2 + 0 + 100 + 2 + 211 + 320 + 31 = 666.

It is not a de Polignac number, because 20100221132031 - 2¹³ = 20100221123839 is a prime.

It is a super-2 number, since 2×20100221132031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20100221131995 and 20100221132013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100221132041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 602616325 + ... + 602649678.

It is an arithmetic number, because the mean of its divisors is an integer number (1292647789290).

Almost surely, 2^{20100221132031} is an apocalyptic number.

20100221132031 is a deficient number, since it is larger than the sum of its proper divisors (10923325810929).

20100221132031 is a wasteful number, since it uses less digits than its factorization.

20100221132031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205266135 (or 1205266132 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20100221132031 its reverse (13023112200102), we get a palindrome (33123333332133).

The spelling of 20100221132031 in words is "twenty trillion, one hundred billion, two hundred twenty-one million, one hundred thirty-two thousand, thirty-one".