1012222421 has 4 divisors (see below), whose sum is σ = 1156825632. Its totient is φ = 867619212.

The previous prime is 1012222417. The next prime is 1012222427. The reversal of 1012222421 is 1242222101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1242222101 = 17761 ⋅69941.

It is a cyclic number.

It is not a de Polignac number, because 1012222421 - 2² = 1012222417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1012222421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012222427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72301595 + ... + 72301608.

It is an arithmetic number, because the mean of its divisors is an integer number (289206408).

Almost surely, 2^1012222421 is an apocalyptic number.

It is an amenable number.

1012222421 is a deficient number, since it is larger than the sum of its proper divisors (144603211).

1012222421 is an equidigital number, since it uses as much as digits as its factorization.

1012222421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144603210.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1012222421 is about 31815.4431212265. The cubic root of 1012222421 is about 1004.0576535122.

Adding to 1012222421 its reverse (1242222101), we get a palindrome (2254444522).

The spelling of 1012222421 in words is "one billion, twelve million, two hundred twenty-two thousand, four hundred twenty-one".