1220121000101 has 8 divisors (see below), whose sum is σ = 1221183073440. Its totient is φ = 1219059102352.

The previous prime is 1220121000083. The next prime is 1220121000127. The reversal of 1220121000101 is 1010001210221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220121000101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220121009101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16543415 + ... + 16617003.

It is an arithmetic number, because the mean of its divisors is an integer number (152647884180).

Almost surely, 2^{1220121000101} is an apocalyptic number.

It is an amenable number.

1220121000101 is a deficient number, since it is larger than the sum of its proper divisors (1062073339).

1220121000101 is a wasteful number, since it uses less digits than its factorization.

1220121000101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87795.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1220121000101 its reverse (1010001210221), we get a palindrome (2230122210322).

The spelling of 1220121000101 in words is "one trillion, two hundred twenty billion, one hundred twenty-one million, one hundred one", and thus it is an aban number.