121220010997 has 2 divisors, whose sum is σ = 121220010998. Its totient is φ = 121220010996.

The previous prime is 121220010973. The next prime is 121220011013. The reversal of 121220010997 is 799010022121.

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., 92342446641 + 28877564356 = 303879^2 + 169934^2 .

It is a cyclic number.

It is not a de Polignac number, because 121220010997 - 2⁷ = 121220010869 is a prime.

It is a super-2 number, since 2×121220010997² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121220010917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610005498 + 60610005499.

It is an arithmetic number, because the mean of its divisors is an integer number (60610005499).

Almost surely, 2^121220010997 is an apocalyptic number.

It is an amenable number.

121220010997 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220010997 is an equidigital number, since it uses as much as digits as its factorization.

121220010997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 34.

The spelling of 121220010997 in words is "one hundred twenty-one billion, two hundred twenty million, ten thousand, nine hundred ninety-seven".