1222010021 has 8 divisors (see below), whose sum is σ = 1235942400. Its totient is φ = 1208151360.

The previous prime is 1222009979. The next prime is 1222010057. The reversal of 1222010021 is 1200102221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222010021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222009984 and 1222010011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222010081) 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, 15260 + ... + 51738.

It is an arithmetic number, because the mean of its divisors is an integer number (154492800).

Almost surely, 2^1222010021 is an apocalyptic number.

It is an amenable number.

1222010021 is a deficient number, since it is larger than the sum of its proper divisors (13932379).

1222010021 is a wasteful number, since it uses less digits than its factorization.

1222010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36859.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1222010021 is about 34957.2599183632. The cubic root of 1222010021 is about 1069.1162298077.

Adding to 1222010021 its reverse (1200102221), we get a palindrome (2422112242).

The spelling of 1222010021 in words is "one billion, two hundred twenty-two million, ten thousand, twenty-one".