1220400021050 has 24 divisors (see below), whose sum is σ = 2594221759776. Its totient is φ = 418422864240.

The previous prime is 1220400021047. The next prime is 1220400021059. The reversal of 1220400021050 is 501200040221.

It is a super-2 number, since 2×1220400021050² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1220400021059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1743428252 + ... + 1743428951.

It is an arithmetic number, because the mean of its divisors is an integer number (108092573324).

Almost surely, 2^{1220400021050} is an apocalyptic number.

1220400021050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220400021050 is an abundant number, since it is smaller than the sum of its proper divisors (1373821738726).

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

1220400021050 is a wasteful number, since it uses less digits than its factorization.

1220400021050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3486857222 (or 3486857217 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

Adding to 1220400021050 its reverse (501200040221), we get a palindrome (1721600061271).

The spelling of 1220400021050 in words is "one trillion, two hundred twenty billion, four hundred million, twenty-one thousand, fifty".