61131021401 has 8 divisors (see below), whose sum is σ = 65071461600. Its totient is φ = 57262883040.

The previous prime is 61131021377. The next prime is 61131021407. The reversal of 61131021401 is 10412013116.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61131021401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61131021407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18073715 + ... + 18077096.

It is an arithmetic number, because the mean of its divisors is an integer number (8133932700).

Almost surely, 2^61131021401 is an apocalyptic number.

It is an amenable number.

61131021401 is a deficient number, since it is larger than the sum of its proper divisors (3940440199).

61131021401 is a wasteful number, since it uses less digits than its factorization.

61131021401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36150919.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 61131021401 its reverse (10412013116), we get a palindrome (71543034517).

The spelling of 61131021401 in words is "sixty-one billion, one hundred thirty-one million, twenty-one thousand, four hundred one".