20012121222131 has 2 divisors, whose sum is σ = 20012121222132. Its totient is φ = 20012121222130.

The previous prime is 20012121222091. The next prime is 20012121222161. The reversal of 20012121222131 is 13122212121002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20012121222131 - 2²² = 20012117027827 is a prime.

It is a super-2 number, since 2×20012121222131² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20012121222161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006060611065 + 10006060611066.

It is an arithmetic number, because the mean of its divisors is an integer number (10006060611066).

Almost surely, 2^{20012121222131} is an apocalyptic number.

20012121222131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012121222131 is an equidigital number, since it uses as much as digits as its factorization.

20012121222131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 20012121222131 its reverse (13122212121002), we get a palindrome (33134333343133).

The spelling of 20012121222131 in words is "twenty trillion, twelve billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred thirty-one".