121972030 has 16 divisors (see below), whose sum is σ = 219940560. Its totient is φ = 48701952.

The previous prime is 121972009. The next prime is 121972033. The reversal of 121972030 is 30279121.

It is a super-2 number, since 2×121972030² = 29754352204641800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121971986 and 121972004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121972033) 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, 4800 + ... + 16339.

It is an arithmetic number, because the mean of its divisors is an integer number (13746285).

Almost surely, 2^121972030 is an apocalyptic number.

121972030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121972030 is a deficient number, since it is larger than the sum of its proper divisors (97968530).

121972030 is a wasteful number, since it uses less digits than its factorization.

121972030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21723.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 121972030 is about 11044.0948022009. The cubic root of 121972030 is about 495.9296612665.

The spelling of 121972030 in words is "one hundred twenty-one million, nine hundred seventy-two thousand, thirty".