1022012001 has 24 divisors (see below), whose sum is σ = 1564289064. Its totient is φ = 640765440.

The previous prime is 1022011973. The next prime is 1022012021. The reversal of 1022012001 is 1002102201.

It can be written as a sum of positive squares in 4 ways, for example, as 430355025 + 591656976 = 20745^2 + 24324^2 .

It is not a de Polignac number, because 1022012001 - 2⁹ = 1022011489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1022012021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 371491 + ... + 374231.

It is an arithmetic number, because the mean of its divisors is an integer number (65178711).

Almost surely, 2^1022012001 is an apocalyptic number.

It is an amenable number.

1022012001 is a deficient number, since it is larger than the sum of its proper divisors (542277063).

1022012001 is a wasteful number, since it uses less digits than its factorization.

1022012001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5201 (or 5198 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1022012001 is about 31968.9224247550. The cubic root of 1022012001 is about 1007.2841460536.

Adding to 1022012001 its reverse (1002102201), we get a palindrome (2024114202).

The spelling of 1022012001 in words is "one billion, twenty-two million, twelve thousand, one".