20021111021002 has 16 divisors (see below), whose sum is σ = 36962051116032. Its totient is φ = 7920439524720.

The previous prime is 20021111020993. The next prime is 20021111021003. The reversal of 20021111021002 is 20012011112002.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (20021111021003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55003052074 + ... + 55003052437.

It is an arithmetic number, because the mean of its divisors is an integer number (2310128194752).

Almost surely, 2^{20021111021002} is an apocalyptic number.

20021111021002 is a deficient number, since it is larger than the sum of its proper divisors (16940940095030).

20021111021002 is a wasteful number, since it uses less digits than its factorization.

20021111021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110006104533.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20021111021002 its reverse (20012011112002), we get a palindrome (40033122133004).

The spelling of 20021111021002 in words is "twenty trillion, twenty-one billion, one hundred eleven million, twenty-one thousand, two".