220102102031 has 4 divisors (see below), whose sum is σ = 251545259472. Its totient is φ = 188658944592.

The previous prime is 220102102019. The next prime is 220102102049. The reversal of 220102102031 is 130201201022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130201201022 = 2 ⋅65100600511.

It is a cyclic number.

It is not a de Polignac number, because 220102102031 - 2¹⁴ = 220102085647 is a prime.

It is a super-2 number, since 2×220102102031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220102101997 and 220102102015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220102102001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15721578710 + ... + 15721578723.

It is an arithmetic number, because the mean of its divisors is an integer number (62886314868).

Almost surely, 2^220102102031 is an apocalyptic number.

220102102031 is a deficient number, since it is larger than the sum of its proper divisors (31443157441).

220102102031 is an equidigital number, since it uses as much as digits as its factorization.

220102102031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31443157440.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 220102102031 its reverse (130201201022), we get a palindrome (350303303053).

The spelling of 220102102031 in words is "two hundred twenty billion, one hundred two million, one hundred two thousand, thirty-one".