1221200000102 has 8 divisors (see below), whose sum is σ = 1831809330000. Its totient is φ = 610596890104.

The previous prime is 1221200000101. The next prime is 1221200000107. The reversal of 1221200000102 is 2010000021221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221200000101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1028477 + ... + 1870872.

It is an arithmetic number, because the mean of its divisors is an integer number (228976166250).

Almost surely, 2^{1221200000102} is an apocalyptic number.

1221200000102 is a deficient number, since it is larger than the sum of its proper divisors (610609329898).

1221200000102 is a wasteful number, since it uses less digits than its factorization.

1221200000102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3109950.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1221200000102 its reverse (2010000021221), we get a palindrome (3231200021323).

The spelling of 1221200000102 in words is "one trillion, two hundred twenty-one billion, two hundred million, one hundred two", and thus it is an aban number.