1231021022 has 24 divisors (see below), whose sum is σ = 2343281400. Its totient is φ = 479618160.

The previous prime is 1231021021. The next prime is 1231021049. The reversal of 1231021022 is 2201201321.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 1231020988 and 1231021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231021021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 569897 + ... + 572052.

It is an arithmetic number, because the mean of its divisors is an integer number (97636725).

Almost surely, 2^1231021022 is an apocalyptic number.

1231021022 is a deficient number, since it is larger than the sum of its proper divisors (1112260378).

1231021022 is a wasteful number, since it uses less digits than its factorization.

1231021022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141976 (or 1141969 counting only the distinct ones).

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

The square root of 1231021022 is about 35085.9091659316. The cubic root of 1231021022 is about 1071.7376552051.

Adding to 1231021022 its reverse (2201201321), we get a palindrome (3432222343).

The spelling of 1231021022 in words is "one billion, two hundred thirty-one million, twenty-one thousand, twenty-two".