121222027981 has 2 divisors, whose sum is σ = 121222027982. Its totient is φ = 121222027980.

The previous prime is 121222027961. The next prime is 121222027987. The reversal of 121222027981 is 189720222121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85108726756 + 36113301225 = 291734^2 + 190035^2 .

It is a cyclic number.

It is not a de Polignac number, because 121222027981 - 2¹¹ = 121222025933 is a prime.

It is a super-2 number, since 2×121222027981² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121222027981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121222027987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60611013990 + 60611013991.

It is an arithmetic number, because the mean of its divisors is an integer number (60611013991).

Almost surely, 2^121222027981 is an apocalyptic number.

It is an amenable number.

121222027981 is a deficient number, since it is larger than the sum of its proper divisors (1).

121222027981 is an equidigital number, since it uses as much as digits as its factorization.

121222027981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 37.

The spelling of 121222027981 in words is "one hundred twenty-one billion, two hundred twenty-two million, twenty-seven thousand, nine hundred eighty-one".