121151620 has 12 divisors (see below), whose sum is σ = 254418444. Its totient is φ = 48460640.

The previous prime is 121151617. The next prime is 121151623. The reversal of 121151620 is 26151121.

It is an interprime number because it is at equal distance from previous prime (121151617) and next prime (121151623).

It can be written as a sum of positive squares in 2 ways, for example, as 81108036 + 40043584 = 9006^2 + 6328^2 .

It is not an unprimeable number, because it can be changed into a prime (121151623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3028771 + ... + 3028810.

It is an arithmetic number, because the mean of its divisors is an integer number (21201537).

Almost surely, 2^121151620 is an apocalyptic number.

121151620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121151620 is an abundant number, since it is smaller than the sum of its proper divisors (133266824).

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

121151620 is a wasteful number, since it uses less digits than its factorization.

121151620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6057590 (or 6057588 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 121151620 is about 11006.8896605717. The cubic root of 121151620 is about 494.8152492181.

It can be divided in two parts, 121151 and 620, that added together give a triangular number (121771 = T₄₉₃).

The spelling of 121151620 in words is "one hundred twenty-one million, one hundred fifty-one thousand, six hundred twenty".