124222021 has 16 divisors (see below), whose sum is σ = 156417408. Its totient is φ = 95832000.

The previous prime is 124222003. The next prime is 124222027. The reversal of 124222021 is 120222421.

It is not a de Polignac number, because 124222021 - 2⁵ = 124221989 is a prime.

It is a super-2 number, since 2×124222021² = 30862221002648882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 124221986 and 124222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124222027) 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, 210 + ... + 15763.

It is an arithmetic number, because the mean of its divisors is an integer number (9776088).

Almost surely, 2^124222021 is an apocalyptic number.

124222021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

124222021 is a deficient number, since it is larger than the sum of its proper divisors (32195387).

124222021 is a wasteful number, since it uses less digits than its factorization.

124222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16092.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 124222021 is about 11145.4933044706. The cubic root of 124222021 is about 498.9605351900.

Adding to 124222021 its reverse (120222421), we get a palindrome (244444442).

The spelling of 124222021 in words is "one hundred twenty-four million, two hundred twenty-two thousand, twenty-one".