121571010 has 64 divisors (see below), whose sum is σ = 353669760. Its totient is φ = 29471040.

The previous prime is 121570993. The next prime is 121571017. The reversal of 121571010 is 10175121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (121571017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17497 + ... + 23436.

It is an arithmetic number, because the mean of its divisors is an integer number (5526090).

Almost surely, 2^121571010 is an apocalyptic number.

121571010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121571010 is an abundant number, since it is smaller than the sum of its proper divisors (232098750).

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

121571010 is a wasteful number, since it uses less digits than its factorization.

121571010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40960 (or 40954 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 18.

The square root of 121571010 is about 11025.9244510381. The cubic root of 121571010 is about 495.3855581945.

The spelling of 121571010 in words is "one hundred twenty-one million, five hundred seventy-one thousand, ten".