121101012551 has 2 divisors, whose sum is σ = 121101012552. Its totient is φ = 121101012550.

The previous prime is 121101012523. The next prime is 121101012577. The reversal of 121101012551 is 155210101121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121101012551 - 2²² = 121096818247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121101012581) 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, 60550506275 + 60550506276.

It is an arithmetic number, because the mean of its divisors is an integer number (60550506276).

Almost surely, 2^121101012551 is an apocalyptic number.

121101012551 is a deficient number, since it is larger than the sum of its proper divisors (1).

121101012551 is an equidigital number, since it uses as much as digits as its factorization.

121101012551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100, while the sum is 20.

Adding to 121101012551 its reverse (155210101121), we get a palindrome (276311113672).

The spelling of 121101012551 in words is "one hundred twenty-one billion, one hundred one million, twelve thousand, five hundred fifty-one".