121356711 has 20 divisors (see below), whose sum is σ = 207184912. Its totient is φ = 69346368.

The previous prime is 121356691. The next prime is 121356713. The reversal of 121356711 is 117653121.

It is not a de Polignac number, because 121356711 - 2⁶ = 121356647 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121356713) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 106450 + ... + 107583.

Almost surely, 2^121356711 is an apocalyptic number.

121356711 is a deficient number, since it is larger than the sum of its proper divisors (85828201).

121356711 is an equidigital number, since it uses as much as digits as its factorization.

121356711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214052 (or 214043 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 121356711 is about 11016.2022040266. The cubic root of 121356711 is about 495.0943071004.

The spelling of 121356711 in words is "one hundred twenty-one million, three hundred fifty-six thousand, seven hundred eleven".