120140363261 has 4 divisors (see below), whose sum is σ = 120143213532. Its totient is φ = 120137512992.

The previous prime is 120140363243. The next prime is 120140363267. The reversal of 120140363261 is 162363041021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 162363041021 = 701 ⋅231616321.

It can be written as a sum of positive squares in 2 ways, for example, as 63529202500 + 56611160761 = 252050^2 + 237931^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120140363261 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120140363267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1360946 + ... + 1446531.

It is an arithmetic number, because the mean of its divisors is an integer number (30035803383).

Almost surely, 2^120140363261 is an apocalyptic number.

It is an amenable number.

120140363261 is a deficient number, since it is larger than the sum of its proper divisors (2850271).

120140363261 is an equidigital number, since it uses as much as digits as its factorization.

120140363261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2850270.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 120140363261 in words is "one hundred twenty billion, one hundred forty million, three hundred sixty-three thousand, two hundred sixty-one".