1221460225040 has 80 divisors (see below), whose sum is σ = 3102194232576. Its totient is φ = 443575680000.

The previous prime is 1221460225031. The next prime is 1221460225043. The reversal of 1221460225040 is 405220641221.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 1221460224994 and 1221460225012.

It is not an unprimeable number, because it can be changed into a prime (1221460225043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263237 + ... + 1584996.

Almost surely, 2^{1221460225040} is an apocalyptic number.

1221460225040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221460225040 is an abundant number, since it is smaller than the sum of its proper divisors (1880734007536).

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

1221460225040 is a wasteful number, since it uses less digits than its factorization.

1221460225040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849008 (or 1849002 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 1221460225040 its reverse (405220641221), we get a palindrome (1626680866261).

The spelling of 1221460225040 in words is "one trillion, two hundred twenty-one billion, four hundred sixty million, two hundred twenty-five thousand, forty".