121971970 has 16 divisors (see below), whose sum is σ = 227120760. Its totient is φ = 47106304.

The previous prime is 121971961. The next prime is 121971973. The reversal of 121971970 is 79179121.

It can be written as a sum of positive squares in 4 ways, for example, as 87291649 + 34680321 = 9343^2 + 5889^2 .

It is a super-2 number, since 2×121971970² = 29754322931361800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121971973) 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, 210007 + ... + 210586.

Almost surely, 2^121971970 is an apocalyptic number.

121971970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121971970 is a deficient number, since it is larger than the sum of its proper divisors (105148790).

121971970 is a wasteful number, since it uses less digits than its factorization.

121971970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420629.

The product of its (nonzero) digits is 7938, while the sum is 37.

The square root of 121971970 is about 11044.0920858167. The cubic root of 121971970 is about 495.9295799479.

The spelling of 121971970 in words is "one hundred twenty-one million, nine hundred seventy-one thousand, nine hundred seventy".