20121022001 has 2 divisors, whose sum is σ = 20121022002. Its totient is φ = 20121022000.

The previous prime is 20121021979. The next prime is 20121022007. The reversal of 20121022001 is 10022012102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19894820401 + 226201600 = 141049^2 + 15040^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121022001 - 2²² = 20116827697 is a prime.

It is not a weakly prime, because it can be changed into another prime (20121022007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060511000 + 10060511001.

It is an arithmetic number, because the mean of its divisors is an integer number (10060511001).

Almost surely, 2^20121022001 is an apocalyptic number.

It is an amenable number.

20121022001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121022001 is an equidigital number, since it uses as much as digits as its factorization.

20121022001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20121022001 its reverse (10022012102), we get a palindrome (30143034103).

The spelling of 20121022001 in words is "twenty billion, one hundred twenty-one million, twenty-two thousand, one".