1220211101012 has 6 divisors (see below), whose sum is σ = 2135369426778. Its totient is φ = 610105550504.

The previous prime is 1220211100987. The next prime is 1220211101029. The reversal of 1220211101012 is 2101011120221.

It can be written as a sum of positive squares in only one way, i.e., 1212826448656 + 7384652356 = 1101284^2 + 85934^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152526387623 + ... + 152526387630.

It is an arithmetic number, because the mean of its divisors is an integer number (355894904463).

Almost surely, 2^{1220211101012} is an apocalyptic number.

It is an amenable number.

1220211101012 is a deficient number, since it is larger than the sum of its proper divisors (915158325766).

1220211101012 is a wasteful number, since it uses less digits than its factorization.

1220211101012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305052775257 (or 305052775255 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1220211101012 its reverse (2101011120221), we get a palindrome (3321222221233).

The spelling of 1220211101012 in words is "one trillion, two hundred twenty billion, two hundred eleven million, one hundred one thousand, twelve".