1172121016 has 32 divisors (see below), whose sum is σ = 2413638000. Its totient is φ = 529200640.

The previous prime is 1172120987. The next prime is 1172121019. The reversal of 1172121016 is 6101212711.

It is a super-2 number, since 2×1172121016² = 2747735352297744512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172121019) 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, 31585 + ... + 57808.

Almost surely, 2^1172121016 is an apocalyptic number.

It is an amenable number.

1172121016 is an abundant number, since it is smaller than the sum of its proper divisors (1241516984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1172121016 is a wasteful number, since it uses less digits than its factorization.

1172121016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89559 (or 89555 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 22.

The square root of 1172121016 is about 34236.2529491765. The cubic root of 1172121016 is about 1054.3646035070.

Adding to 1172121016 its reverse (6101212711), we get a palindrome (7273333727).

The spelling of 1172121016 in words is "one billion, one hundred seventy-two million, one hundred twenty-one thousand, sixteen".