1221012110019 has 8 divisors (see below), whose sum is σ = 1753248158032. Its totient is φ = 751392067680.

The previous prime is 1221012109979. The next prime is 1221012110023. The reversal of 1221012110019 is 9100112101221.

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

It is not a de Polignac number, because 1221012110019 - 2¹⁵ = 1221012077251 is a prime.

It is a super-2 number, since 2×1221012110019² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221012109977 and 1221012110004.

It is not an unprimeable number, because it can be changed into a prime (1221012110029) 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, 15654001372 + ... + 15654001449.

It is an arithmetic number, because the mean of its divisors is an integer number (219156019754).

Almost surely, 2^{1221012110019} is an apocalyptic number.

1221012110019 is a deficient number, since it is larger than the sum of its proper divisors (532236048013).

1221012110019 is a wasteful number, since it uses less digits than its factorization.

1221012110019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31308002837.

The product of its (nonzero) digits is 72, while the sum is 21.

The spelling of 1221012110019 in words is "one trillion, two hundred twenty-one billion, twelve million, one hundred ten thousand, nineteen".