20121170 has 32 divisors (see below), whose sum is σ = 38209536. Its totient is φ = 7617600.

The previous prime is 20121169. The next prime is 20121173. The reversal of 20121170 is 7112102.

It is a super-2 number, since 2×20121170² = 809722964337800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20121173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13880 + ... + 15260.

It is an arithmetic number, because the mean of its divisors is an integer number (1194048).

Almost surely, 2^20121170 is an apocalyptic number.

20121170 is a deficient number, since it is larger than the sum of its proper divisors (18088366).

20121170 is a wasteful number, since it uses less digits than its factorization.

20121170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1466.

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 20121170 is about 4485.6627158091. The cubic root of 20121170 is about 271.9888349656.

Adding to 20121170 its reverse (7112102), we get a palindrome (27233272).

The spelling of 20121170 in words is "twenty million, one hundred twenty-one thousand, one hundred seventy".