61200622121 has 4 divisors (see below), whose sum is σ = 61202354772. Its totient is φ = 61198889472.

The previous prime is 61200622019. The next prime is 61200622123. The reversal of 61200622121 is 12122600216.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29699696896 + 31500925225 = 172336^2 + 177485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61200622121 is a prime.

It is a super-2 number, since 2×61200622121² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61200622123) 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, 812216 + ... + 884361.

It is an arithmetic number, because the mean of its divisors is an integer number (15300588693).

Almost surely, 2^61200622121 is an apocalyptic number.

It is an amenable number.

61200622121 is a deficient number, since it is larger than the sum of its proper divisors (1732651).

61200622121 is a wasteful number, since it uses less digits than its factorization.

61200622121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1732650.

The product of its (nonzero) digits is 576, while the sum is 23.

The spelling of 61200622121 in words is "sixty-one billion, two hundred million, six hundred twenty-two thousand, one hundred twenty-one".