421020011002 has 4 divisors (see below), whose sum is σ = 631530016506. Its totient is φ = 210510005500.

The previous prime is 421020010981. The next prime is 421020011059. The reversal of 421020011002 is 200110020124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 410315832481 + 10704178521 = 640559^2 + 103461^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105255002749 + ... + 105255002752.

Almost surely, 2^421020011002 is an apocalyptic number.

421020011002 is a deficient number, since it is larger than the sum of its proper divisors (210510005504).

421020011002 is a wasteful number, since it uses less digits than its factorization.

421020011002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210510005503.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 421020011002 its reverse (200110020124), we get a palindrome (621130031126).

The spelling of 421020011002 in words is "four hundred twenty-one billion, twenty million, eleven thousand, two".