1220212220010 has 128 divisors (see below), whose sum is σ = 3528356198400. Its totient is φ = 263826097920.

The previous prime is 1220212219951. The next prime is 1220212220011. The reversal of 1220212220010 is 100222120221.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (1220212220011) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2406061 + ... + 2868719.

It is an arithmetic number, because the mean of its divisors is an integer number (27565282800).

Almost surely, 2^{1220212220010} is an apocalyptic number.

1220212220010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220212220010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1764178099200).

1220212220010 is an abundant number, since it is smaller than the sum of its proper divisors (2308143978390).

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

1220212220010 is a wasteful number, since it uses less digits than its factorization.

1220212220010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463356.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1220212220010 its reverse (100222120221), we get a palindrome (1320434340231).

The spelling of 1220212220010 in words is "one trillion, two hundred twenty billion, two hundred twelve million, two hundred twenty thousand, ten".