20121322051 has 2 divisors, whose sum is σ = 20121322052. Its totient is φ = 20121322050.

The previous prime is 20121322049. The next prime is 20121322057. The reversal of 20121322051 is 15022312102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20121322051 - 2¹ = 20121322049 is a prime.

Together with 20121322049, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20121322057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060661025 + 10060661026.

It is an arithmetic number, because the mean of its divisors is an integer number (10060661026).

Almost surely, 2^20121322051 is an apocalyptic number.

20121322051 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121322051 is an equidigital number, since it uses as much as digits as its factorization.

20121322051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 20121322051 its reverse (15022312102), we get a palindrome (35143634153).

The spelling of 20121322051 in words is "twenty billion, one hundred twenty-one million, three hundred twenty-two thousand, fifty-one".