1002122220021 has 16 divisors (see below), whose sum is σ = 1456281414336. Its totient is φ = 609260587776.

The previous prime is 1002122219999. The next prime is 1002122220049. The reversal of 1002122220021 is 1200222212001.

It is not a de Polignac number, because 1002122220021 - 2²³ = 1002113831413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002122225021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154788580 + ... + 154795053.

It is an arithmetic number, because the mean of its divisors is an integer number (91017588396).

Almost surely, 2^{1002122220021} is an apocalyptic number.

It is an amenable number.

1002122220021 is a deficient number, since it is larger than the sum of its proper divisors (454159194315).

1002122220021 is a wasteful number, since it uses less digits than its factorization.

1002122220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309583732.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1002122220021 its reverse (1200222212001), we get a palindrome (2202344432022).

The spelling of 1002122220021 in words is "one trillion, two billion, one hundred twenty-two million, two hundred twenty thousand, twenty-one".