20021201032131 has 64 divisors (see below), whose sum is σ = 33333432330240. Its totient is φ = 11784360297600.

The previous prime is 20021201032127. The next prime is 20021201032159. The reversal of 20021201032131 is 13123010212002.

It is not a de Polignac number, because 20021201032131 - 2² = 20021201032127 is a prime.

It is a super-2 number, since 2×20021201032131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20021201032171) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 158143306 + ... + 158269856.

It is an arithmetic number, because the mean of its divisors is an integer number (520834880160).

Almost surely, 2^{20021201032131} is an apocalyptic number.

20021201032131 is a deficient number, since it is larger than the sum of its proper divisors (13312231298109).

20021201032131 is a wasteful number, since it uses less digits than its factorization.

20021201032131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146193 (or 146187 counting only the distinct ones).

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

Adding to 20021201032131 its reverse (13123010212002), we get a palindrome (33144211244133).

The spelling of 20021201032131 in words is "twenty trillion, twenty-one billion, two hundred one million, thirty-two thousand, one hundred thirty-one".