121021200951643 has 2 divisors, whose sum is σ = 121021200951644. Its totient is φ = 121021200951642.

The previous prime is 121021200951559. The next prime is 121021200951697. The reversal of 121021200951643 is 346159002120121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121021200951643 is a prime.

It is a super-2 number, since 2×121021200951643² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121021200931643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510600475821 + 60510600475822.

It is an arithmetic number, because the mean of its divisors is an integer number (60510600475822).

Almost surely, 2^{121021200951643} is an apocalyptic number.

121021200951643 is a deficient number, since it is larger than the sum of its proper divisors (1).

121021200951643 is an equidigital number, since it uses as much as digits as its factorization.

121021200951643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 121021200951643 in words is "one hundred twenty-one trillion, twenty-one billion, two hundred million, nine hundred fifty-one thousand, six hundred forty-three".