121021131 has 24 divisors (see below), whose sum is σ = 204773184. Its totient is φ = 62867280.

The previous prime is 121021111. The next prime is 121021151. The reversal of 121021131 is 131120121.

It is an interprime number because it is at equal distance from previous prime (121021111) and next prime (121021151).

It is not a de Polignac number, because 121021131 - 2⁶ = 121021067 is a prime.

It is a super-2 number, since 2×121021131² = 29292228297038322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121021111) 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, 35805 + ... + 39038.

It is an arithmetic number, because the mean of its divisors is an integer number (8532216).

Almost surely, 2^121021131 is an apocalyptic number.

121021131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121021131 is a deficient number, since it is larger than the sum of its proper divisors (83752053).

121021131 is a wasteful number, since it uses less digits than its factorization.

121021131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74871 (or 74864 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 121021131 is about 11000.9604580691. The cubic root of 121021131 is about 494.6375348732.

Adding to 121021131 its reverse (131120121), we get a palindrome (252141252).

The spelling of 121021131 in words is "one hundred twenty-one million, twenty-one thousand, one hundred thirty-one".