121001010157 has 2 divisors, whose sum is σ = 121001010158. Its totient is φ = 121001010156.

The previous prime is 121001010101. The next prime is 121001010173. The reversal of 121001010157 is 751010100121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110349531721 + 10651478436 = 332189^2 + 103206^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121001010157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121001010187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500505078 + 60500505079.

It is an arithmetic number, because the mean of its divisors is an integer number (60500505079).

Almost surely, 2^121001010157 is an apocalyptic number.

It is an amenable number.

121001010157 is a deficient number, since it is larger than the sum of its proper divisors (1).

121001010157 is an equidigital number, since it uses as much as digits as its factorization.

121001010157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70, while the sum is 19.

Adding to 121001010157 its reverse (751010100121), we get a palindrome (872011110278).

The spelling of 121001010157 in words is "one hundred twenty-one billion, one million, ten thousand, one hundred fifty-seven".