6961397121 has 24 divisors (see below), whose sum is σ = 11996967840. Its totient is φ = 3977940456.

The previous prime is 6961397119. The next prime is 6961397239. The reversal of 6961397121 is 1217931696.

6961397121 is a `hidden beast` number, since 6 + 9 + 613 + 9 + 7 + 1 + 21 = 666.

It is not a de Polignac number, because 6961397121 - 2¹ = 6961397119 is a prime.

It is a super-2 number, since 2×6961397121² = 96922099752534177282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6961397321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2629591 + ... + 2632236.

It is an arithmetic number, because the mean of its divisors is an integer number (499873660).

Almost surely, 2^6961397121 is an apocalyptic number.

It is an amenable number.

6961397121 is a deficient number, since it is larger than the sum of its proper divisors (5035570719).

6961397121 is a wasteful number, since it uses less digits than its factorization.

6961397121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5261850 (or 5261837 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 6961397121 is about 83434.9873913816. The cubic root of 6961397121 is about 1909.4082869617.

The spelling of 6961397121 in words is "six billion, nine hundred sixty-one million, three hundred ninety-seven thousand, one hundred twenty-one".