20121090037 has 2 divisors, whose sum is σ = 20121090038. Its totient is φ = 20121090036.

The previous prime is 20121090019. The next prime is 20121090043. The reversal of 20121090037 is 73009012102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15404284996 + 4716805041 = 124114^2 + 68679^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121090037 - 2⁷ = 20121089909 is a prime.

It is a super-2 number, since 2×20121090037² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20121089993 and 20121090020.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121090047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060545018 + 10060545019.

It is an arithmetic number, because the mean of its divisors is an integer number (10060545019).

Almost surely, 2^20121090037 is an apocalyptic number.

It is an amenable number.

20121090037 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121090037 is an equidigital number, since it uses as much as digits as its factorization.

20121090037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 25.

The spelling of 20121090037 in words is "twenty billion, one hundred twenty-one million, ninety thousand, thirty-seven".