21221002001131 has 2 divisors, whose sum is σ = 21221002001132. Its totient is φ = 21221002001130.

The previous prime is 21221002001099. The next prime is 21221002001149. The reversal of 21221002001131 is 13110020012212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21221002001131 - 2⁵ = 21221002001099 is a prime.

It is a super-2 number, since 2×21221002001131² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21221002008131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610501000565 + 10610501000566.

It is an arithmetic number, because the mean of its divisors is an integer number (10610501000566).

Almost surely, 2^{21221002001131} is an apocalyptic number.

21221002001131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221002001131 is an equidigital number, since it uses as much as digits as its factorization.

21221002001131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21221002001131 its reverse (13110020012212), we get a palindrome (34331022013343).

The spelling of 21221002001131 in words is "twenty-one trillion, two hundred twenty-one billion, two million, one thousand, one hundred thirty-one".