1220121702 has 24 divisors (see below), whose sum is σ = 2646357480. Its totient is φ = 406282560.

The previous prime is 1220121677. The next prime is 1220121703. The reversal of 1220121702 is 2071210221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220121703) 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, 17427 + ... + 52382.

It is an arithmetic number, because the mean of its divisors is an integer number (110264895).

Almost surely, 2^1220121702 is an apocalyptic number.

1220121702 is an abundant number, since it is smaller than the sum of its proper divisors (1426235778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220121702 is a wasteful number, since it uses less digits than its factorization.

1220121702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70788 (or 70785 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 1220121702 is about 34930.2405087626. The cubic root of 1220121702 is about 1068.5652596246.

Adding to 1220121702 its reverse (2071210221), we get a palindrome (3291331923).

The spelling of 1220121702 in words is "one billion, two hundred twenty million, one hundred twenty-one thousand, seven hundred two".