1221212021102 has 8 divisors (see below), whose sum is σ = 1833440548800. Its totient is φ = 610065171504.

The previous prime is 1221212021101. The next prime is 1221212021143. The reversal of 1221212021102 is 2011202121221.

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 (1221212021101) 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, 270416702 + ... + 270421217.

It is an arithmetic number, because the mean of its divisors is an integer number (229180068600).

Almost surely, 2^{1221212021102} is an apocalyptic number.

1221212021102 is a deficient number, since it is larger than the sum of its proper divisors (612228527698).

1221212021102 is a wasteful number, since it uses less digits than its factorization.

1221212021102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540839050.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1221212021102 its reverse (2011202121221), we get a palindrome (3232414142323).

The spelling of 1221212021102 in words is "one trillion, two hundred twenty-one billion, two hundred twelve million, twenty-one thousand, one hundred two".