1220010001002 has 48 divisors (see below), whose sum is σ = 2846834252808. Its totient is φ = 375368670720.

The previous prime is 1220010000959. The next prime is 1220010001057. The reversal of 1220010001002 is 2001000100221.

It can be written as a sum of positive squares in 4 ways, for example, as 599461514001 + 620548487001 = 774249^2 + 787749^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4905198 + ... + 5147910.

Almost surely, 2^{1220010001002} is an apocalyptic number.

1220010001002 is an abundant number, since it is smaller than the sum of its proper divisors (1626824251806).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220010001002 is a wasteful number, since it uses less digits than its factorization.

1220010001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264215 (or 264212 counting only the distinct ones).

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

Adding to 1220010001002 its reverse (2001000100221), we get a palindrome (3221010101223).

The spelling of 1220010001002 in words is "one trillion, two hundred twenty billion, ten million, one thousand, two".