12212020981 has 2 divisors, whose sum is σ = 12212020982. Its totient is φ = 12212020980.

The previous prime is 12212020973. The next prime is 12212021071. The reversal of 12212020981 is 18902021221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10173949956 + 2038071025 = 100866^2 + 45145^2 .

It is a cyclic number.

It is not a de Polignac number, because 12212020981 - 2³ = 12212020973 is a prime.

It is a super-2 number, since 2×12212020981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12212020921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106010490 + 6106010491.

It is an arithmetic number, because the mean of its divisors is an integer number (6106010491).

Almost surely, 2^12212020981 is an apocalyptic number.

It is an amenable number.

12212020981 is a deficient number, since it is larger than the sum of its proper divisors (1).

12212020981 is an equidigital number, since it uses as much as digits as its factorization.

12212020981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 28.

It can be divided in two parts, 1221 and 2020981, that added together give a palindrome (2022202).

The spelling of 12212020981 in words is "twelve billion, two hundred twelve million, twenty thousand, nine hundred eighty-one".