20211001022 has 4 divisors (see below), whose sum is σ = 30316501536. Its totient is φ = 10105500510.

The previous prime is 20211001007. The next prime is 20211001037. The reversal of 20211001022 is 22010011202.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (20211001007) and next prime (20211001037).

It is a super-2 number, since 2×20211001022² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20211000994 and 20211001012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5052750254 + ... + 5052750257.

It is an arithmetic number, because the mean of its divisors is an integer number (7579125384).

Almost surely, 2^20211001022 is an apocalyptic number.

20211001022 is a deficient number, since it is larger than the sum of its proper divisors (10105500514).

20211001022 is a wasteful number, since it uses less digits than its factorization.

20211001022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10105500513.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20211001022 its reverse (22010011202), we get a palindrome (42221012224).

The spelling of 20211001022 in words is "twenty billion, two hundred eleven million, one thousand, twenty-two".