121531070 has 16 divisors (see below), whose sum is σ = 219308688. Its totient is φ = 48489600.

The previous prime is 121531037. The next prime is 121531117. The reversal of 121531070 is 70135121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11144 + ... + 19163.

It is an arithmetic number, because the mean of its divisors is an integer number (13706793).

Almost surely, 2^121531070 is an apocalyptic number.

121531070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121531070 is a deficient number, since it is larger than the sum of its proper divisors (97777618).

121531070 is a wasteful number, since it uses less digits than its factorization.

121531070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30715.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 121531070 is about 11024.1131162557. The cubic root of 121531070 is about 495.3313022050.

Adding to 121531070 its reverse (70135121), we get a palindrome (191666191).

The spelling of 121531070 in words is "one hundred twenty-one million, five hundred thirty-one thousand, seventy".