121755372063 has 32 divisors (see below), whose sum is σ = 187502031360. Its totient is φ = 69643566720.

The previous prime is 121755372049. The next prime is 121755372077. The reversal of 121755372063 is 360273557121.

It is an interprime number because it is at equal distance from previous prime (121755372049) and next prime (121755372077).

It is not a de Polignac number, because 121755372063 - 2⁵ = 121755372031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121755352063) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1510843 + ... + 1589388.

It is an arithmetic number, because the mean of its divisors is an integer number (5859438480).

Almost surely, 2^121755372063 is an apocalyptic number.

121755372063 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121755372063 is a deficient number, since it is larger than the sum of its proper divisors (65746659297).

121755372063 is a wasteful number, since it uses less digits than its factorization.

121755372063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3100319.

The product of its (nonzero) digits is 264600, while the sum is 42.

The spelling of 121755372063 in words is "one hundred twenty-one billion, seven hundred fifty-five million, three hundred seventy-two thousand, sixty-three".