1220100034440 has 64 divisors (see below), whose sum is σ = 4183200120960. Its totient is φ = 278880007680.

The previous prime is 1220100034423. The next prime is 1220100034457. The reversal of 1220100034440 is 444300010221.

It is an interprime number because it is at equal distance from previous prime (1220100034423) and next prime (1220100034457).

It is a super-2 number, since 2×1220100034440² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 726249181 + ... + 726250860.

It is an arithmetic number, because the mean of its divisors is an integer number (65362501890).

Almost surely, 2^{1220100034440} is an apocalyptic number.

1220100034440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220100034440 is an abundant number, since it is smaller than the sum of its proper divisors (2963100086520).

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

1220100034440 is a wasteful number, since it uses less digits than its factorization.

1220100034440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452500062 (or 1452500058 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 1220100034440 its reverse (444300010221), we get a palindrome (1664400044661).

The spelling of 1220100034440 in words is "one trillion, two hundred twenty billion, one hundred million, thirty-four thousand, four hundred forty".