121220111420951 has 2 divisors, whose sum is σ = 121220111420952. Its totient is φ = 121220111420950.

The previous prime is 121220111420911. The next prime is 121220111420983. The reversal of 121220111420951 is 159024111022121.

It is an a-pointer prime, because the next prime (121220111420983) can be obtained adding 121220111420951 to its sum of digits (32).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121220111420951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121220111420911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610055710475 + 60610055710476.

It is an arithmetic number, because the mean of its divisors is an integer number (60610055710476).

Almost surely, 2^{121220111420951} is an apocalyptic number.

121220111420951 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220111420951 is an equidigital number, since it uses as much as digits as its factorization.

121220111420951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 32.

The spelling of 121220111420951 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred eleven million, four hundred twenty thousand, nine hundred fifty-one".